Use an absolute path to override the base path of the client, or a relative
path to append to the base path of the client. The URI can contain the query
string as well. Use an array to provide a URI template and additional variables
to use in the URI template expansion.

Parameters

array$options Options to apply to the request. For BC compatibility, you can also
pass a string to tell Guzzle to download the body of the response to a
particular location. Use the 'body' option instead for forward compatibility.